sound: usb-audio: remove MIN_PACKS_URB

Remove the MIN_PACKS_URB symbol because other limits can force the
number of packets down to one, regardless of the value of this symbol,
and nobody has ever changed it anyway.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 6 insertions, 8 deletions

diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
index c69cc6e4f549..2b24496ddec7 100644
--- a/sound/usb/usbaudio.c
+++ b/sound/usb/usbaudio.c
@@ -107,7 +107,6 @@ MODULE_PARM_DESC(ignore_ctl_error,
 #define MAX_PACKS_HS    (MAX_PACKS * 8) /* in high speed mode */
 #define MAX_URBS        8
 #define SYNC_URBS       4       /* always four urbs for sync */
-#define MIN_PACKS_URB   1       /* minimum 1 packet per urb */
 #define MAX_QUEUE       24      /* try not to exceed this queue length, in ms */
 
 struct audioformat {
@@ -1071,8 +1070,7 @@ static int init_substream_urbs(struct snd_usb_substream *subs, unsigned int peri
         subs->packs_per_ms = packs_per_ms;
 
         if (is_playback) {
-                urb_packs = nrpacks;
-                urb_packs = max(urb_packs, (unsigned int)MIN_PACKS_URB);
+                urb_packs = max(nrpacks, 1);
                 urb_packs = min(urb_packs, (unsigned int)MAX_PACKS);
         } else
                 urb_packs = 1;
@@ -1093,9 +1091,9 @@ static int init_substream_urbs(struct snd_usb_substream *subs, unsigned int peri
                 total_packs = (total_packs + packs_per_ms - 1)
                                 & ~(packs_per_ms - 1);
                 /* we need at least two URBs for queueing */
-                if (total_packs < 2 * MIN_PACKS_URB * packs_per_ms)
-                        total_packs = 2 * MIN_PACKS_URB * packs_per_ms;
-                else {
+                if (total_packs < 2 * packs_per_ms) {
+                        total_packs = 2 * packs_per_ms;
+                } else {
                         /* and we don't want too long a queue either */
                         maxpacks = max((unsigned int)MAX_QUEUE, urb_packs * 2);
                         if (total_packs > maxpacks * packs_per_ms)
@@ -1909,7 +1907,7 @@ static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substre
          * in the current code assume the 1ms period.
          */
         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
-                                     1000 * MIN_PACKS_URB,
+                                     1000,
                                      /*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX);
 
         err = check_hw_params_convention(subs);
@@ -3753,7 +3751,7 @@ static int usb_audio_resume(struct usb_interface *intf)
 
 static int __init snd_usb_audio_init(void)
 {
-        if (nrpacks < MIN_PACKS_URB || nrpacks > MAX_PACKS) {
+        if (nrpacks < 1 || nrpacks > MAX_PACKS) {
                 printk(KERN_WARNING "invalid nrpacks value.\n");
                 return -EINVAL;
         }